param(
    [int] $Port = 7788,
    [string] $Log = "$PSScriptRoot\sidecar_loop.log"
)

$ErrorActionPreference = 'Stop'
"[sidecar] listening on 127.0.0.1:$Port" | Out-File $Log -Encoding utf8

$listener = New-Object System.Net.Sockets.TcpListener([System.Net.IPAddress]::Loopback, $Port)
$listener.Start()

while ($true) {
    try {
        $client = $listener.AcceptTcpClient()
        "[sidecar] === shard connected ===" | Add-Content $Log

        $stream = $client.GetStream()
        $reader = New-Object System.IO.StreamReader($stream)

        while ($null -ne ($line = $reader.ReadLine())) {
            "[sidecar] <- $line" | Add-Content $Log
        }

        "[sidecar] === shard disconnected ===" | Add-Content $Log
        $client.Close()
    }
    catch {
        "[sidecar] error: $_" | Add-Content $Log
        Start-Sleep -Milliseconds 200
    }
}